Knife



Nov. 19, 1935. A, `LLA cRolx 2,021,656

KNIFE Filed NOV. 19, 1934 A 30 10 f/ i sharpened and replacement oi theblade readily Patented Nov. 19, 1935 anni PATENT OFFICE KNIFE Arthur J.La Croix, Southbridge, Mass., assgnor to Hyde Manufacturing Company,Southbridge, Mass., a corporation cf Massachusetts Application November19, 1934, Serial No. 753,693

3 Claims.

My invention relates to a knife which is more especially .adapted to thecutting of linoleums land the like and wherein the blade is removablyheld in place to enable the blade to be repeatedly made should occasionrequire.

The invention has for its object the provision of a' rather simple andinexpensive means Whereby the blade will be effectively and mmovablyheld in proper position in the knife handle while at the same timepermitting the blade to be easily released and removed to be replaced byanother type of blade adapted for other uses and .arranged to beemployed with the handle portion oi the knife.

The invention, somewhat generally stated, comprises a handle provided atone end with a socket. adapted to receive the shank portion of theblade; the shank portion of the blade and the socket of the handle beingprovided with cooperating surfaces adapted to interengage and hold theblade against lengthwise movement; and means having adjustableengagement with the socketend oi the handle whereby the blade will belocked in place when said means is moved into a predetermined relationwith the handle.

The objects of my invention and its advantages will all be more fullycomprehended from the following detailed description of the accompanyingdrawing, wherein- Figure 1 is a side elevation of the knife embodying myinvention.

Figure 2 is a longitudinal sectional view oi one end o1" the handle andof the blade holding means, with the other end of the handle and theblade shown in elevation and the latter locked in place.

Figure 3 is a similar View with the handle given a partial rotationabout the axis of the blade and showing the blade holding means andblade in releasing position.

Figure d is a cross-sectional view taken substantially on the line ll-@lof Figure 2 and looking in the direction of the arrows.

Figure 5 is an enlarged longitudinal sectional view of the bladereceiving end of the handle with the blade removed.

Figure 6 is a cross sectional view taken substantially on the line 6-6of' Figure 5, looking in the direction of the arrows.

Figure 'l is a perspective view of the blade locking member.

The embodiment oi the invention as disclosed in the drawing comprisesthe handle II! of suitable formation and of wood or any suitablematerial, one end thereof provided with a bore of predetermined length,with the orice of the bore co-untersunk or slightly enlarged as shown atil for reasons hereinafter set forth.

This bore of the handle is intended to receive a sleeve member I2 ofpredetermined length somewhat greater than the depth of the bore, andthis sleeve member I2, aside from having a snug t in the bore oi thehandle is also held against any movement in the handle by a cross-pinI4. As the sleeve member is of greater length than the depth oi the boreone end of the sleeve is allowed to protrude beyond the end of thehandle; and this outer end or the sleeve is externally threaded as shownat I5. The sleeve I2, at a predetermined distance removed from its innerend, is provided on its inner circumference with an interrupted orsectional flange I6 disposed circumferentially except for thediametrically opposite gaps or openings I'I, I1 formed by spacing theflange segments a suitable distance apart'.

Each segment of the interrupted flange I6 at points intermediate of thegaps or openings, preferably substantially ninety degrees removed fromthe gaps, is laterally ori-set or enlarged rearwardly to provide ashoulder or stop I8 on the side of the interrupted flange disposedtoward the inner end ofthe sleeve. Each segment adjacent the shoulder I8is dished toward the outer or opposite end of the sleeve so as toprovide a socket Ia.

The blade I9 is provided 'with a shank 20 or' transverse width somewhatless than the inner diameter of the sleeve I2 to permit the shank of theblade to be easily inserted into the sleeve. The inner end of theblade-shank on opposite edges is cut away as at 2| so as to provide theshoulders 22, 22 and to reduce the Width of the shank adjacent theshoulders 22, 22 so that this reduced portion of the blade-shank may ntinto the circle or diametrical space between the flangesegments afterthe shouldered end of the bladeshank has passed through the openings orgaps I1, I 'I between the iiange segments, as shown, for example, inFigures 2 .and 4.

As is ,apparent from this construction, the blade-shank 26 can becompletely inserted in place only when the end of the shank registerswith the openings or gaps I1, I1, at which time the deepest portions ofthe cut-out edges of the blade-shank, namely the portions .adjacent theshoulders 22, 22, will then be in position to receive the segments ofthe flange I6 upon slight rotative movement either of the handle or ofthe blade.

The rotative movement of either blade will cause the shouldered end ofthe shank to ent/er the sockets I8- and `engage with the shoulders I8,I8 on the ange segments.

In order to lock the blade in place and to hold the shouldered end ofthe shank in the sockets, I provide an internally threaded annularmember or ferrule 23 provided at one end with an inturned flange as .at2d. This flanged end of the ferrule 23 is provided with a. disc 25intended to be held in the ferrule by the inturned ange 24 whichenhandle or gages an annular shoulder 25a on the disc. The disc is freeto rotate on the flange 24 and is provided with a transverse slot 26 oflength suicient to receive the shank 2Q of the blade. The interior ofthe ferrule 23 is threaded to a point slightly spaced from the disc 25where the ferrule is provided with a ange 2l which engages the innerface of the disc and holds the latter in place between flanges 24 and2l, while permitting the free rotative movement between the ferrule andthe disc. That is to say, the ferrule 23 may be screwed lengthwise ofthe sleeve I2 while the disc 25, through which the blade-shank 20extends, may be held stationary.

As clearly shown in the drawing, the shank 2? of the blade is of lesserwidth than the blade proper so that shoulders are provided at 28; andthe blade proper being of width greater than the length of slot 26 inthe disc 25 the ferrule may be screwed outwardly into abutting relationwith the shoulders 28.

In order to secure the knife blade I9 in the handle I0, it is essentialto screw the ierrule 23 down on the sleeve I2 or inwardly until itenters the flared orice i I of the bore, when the notched inner end ofthe blade-shank 20 will be able to extend suihciently within the sleeveI2, where the notched inner end can be passed through the openings Il',I'I between the flange segments I6 and the blade, or the handle, given apartial rotation suiiciently to bring the shoulders 22, 22 of theblade-shank into engagement with shoulders ES. Upon screwing the ferruleoutwardly, namely in unscrewing direction, the shoulders 22, 22 of theblade-shank will immediately be drawn into the sockets I8a and theposition of the blade relative to the sockets maintained and locked inposition by reason of the ferrule 23 being brought into firm engagementwith the shoulders 28, 28 of the blade. As the disc 25 is free to rotatein the ferrule, the blade may be inserted into place by dropping theblade through the slot of the disc (ferrule 23 having previously beenscrewed inwardly) and through the openings between the ange segments andthen upon screwing the ferrule in the opposite direction will force theblade against the shoulders I 8, preventing its further rotativemovement and causing its shoulders to be drawn into the sockets.

This will lock the blade in position and prevent any rotative movementof the blade relative to the handle and also prevent longitudinalmovement of the blade because of the abutting relation between theshoulders 28 of the blade and the protruding surface of the disc 25 offerrule 23. The lower or inner end of the blade-shank can not bewithdrawn until the shank is brought to register with the gaps oropenings I'I, II. In order to accomplish such movement of the shankthere must be suilicient play between the shoulders 23 of the blade andthe disc of the ferrule. It is apparent, therefore, that the blade musthave suflicient movement longitudinally into the .sleeve in order topermit the shoulders 22, 22

of the blade-shank to clear or move out of the sockets in theinterrupted ilange and ride along the inner surfaces of theHarige-segments. It is evident therefore that the blade will be securelylocked in place and held against rotative movement.

In order to remove the blade, the ferrule 23 must be screwed down on thesleeve I2 until the ierrule enters the enlarged orice II. This permitsthe shouldered end of the blade-shank to move out of the sockets in theange segments i5 and the blade-shank brought to register with the gapsor openings Il', Il, allowing the blade to be entirely withdrawn forpurposes of sharpening 5 or to be replaced by another blade.

As a guide for the insertion of the blade, the holding pin I4 isinserted through the handle and the sleeve I2 so as to extend parallelwith the openings I1, I'I between the flange segments; 10 and with theends of the pin visible on the handle exterior, the blade should be heldto align and extend parallel with the pin which will present the end ofthe shank in line with the openings.

'I'he structure disclosed is believed to be the best embodiment of theinvention and has been described in terms which are employed merely asterms of description and not as terms of limitation, as structuralmodifications are possible and may be made without, however, departingfrom the spirit of my invention.

What I claim is:

1. In a device of the character described provided with a handle, acylindrical member adapted to be secured to the handle and externallythreaded at one end, the member on its interior at a predetermineddistance from its ends being provided with a sectional annular ilange,the sections being spaced apart at their ends at dia- 30 metricallyopposite points in the member, said ilange sections on their facesdisposed toward the inner end of the member being each provided with ashoulder, and blade shank receiving means adapted to screw lengthwise onthe threaded end of the member so as to extend the distance between saidmeans and said sectional flange.

2. In a device of the character described, a cylindrical member threadedat one end and provided with a sectional annular iiange on its interiorintermediate of its ends; the sections being spaced apart so as toprovide passageways at diametrically opposite points, the ange sectionson their faces disposed toward the inner end of the member havingsockets, and a ferrule member adapted to screw lengthwise of saidcylindrical member, said ferrule being provided with a disc rotatablymounted in said ferrule and provided with a transverse slot adapted toreceive a at sided shank of a. blade or tool.

3. A device of the character described for securing the shank of a bladeor tool to a handle, comprising an elongated cylindrical member threadedexteriorly at one end while the other 5.5 end is adapted to be securedto the handle, the member on its interior and intermediate of its l endsbeing provided with an annular flange having cut out portions atdiametrically opposite points, the flange on its inner face beingprovided with arresting surfaces, an internally threaded ferrule adaptedto screw lengthwise of said member, the outer end of the ferrule beingprovided with a disc rotatably mounted in the .ferrule and provided witha transverse slot of length corresponding with the internal diameter ofsaid member, said slot being adapted to receive a ilat sided shank of abla-de or tool provided with a reduced portion at a distance removedfrom the inner end approximating the inner diameter of said flange.

ARTI-IUE. J. LA CROIX.

